Which causes the production of vitamin D in humans?

A. ultraviolet rays

B. radio waves

C. gamma rays

D. X-rays

The ability to hunt others changes the fossil record. Why?

Solve without using a calculator. on a cold day near the ocean, it was found that 8 g of an unknown gas occupies a volume that is a little less than 6 l. based on this information, what is the most likely identity of the unknown gas?

102) Consider massive gliders that slide friction - free along a horizontal air track Glider A has a mass of 1 kg, aspeed of 1 m/s, and collides with Glider B that has a mass of 5 kg and is at rest.

If the difference in electronegativity between atoms of different non-metals is small, the atoms of the two non-metals will most likely

Explain how your weight would change if you were on a space ship traveling to the moon

How far is Jupiter from the sun?

Steam moves into a cylinder of a steam engine at a constant pressure and does 2.34 J of work on a piston. The diameter of the piston is 3.4 cm and the piston travels 4.6cm. What is the pressure of the steam?

Identify each type of simple machine.

A car's speedometer reads 20 m/s after accelerating, from a standing start, for 25s. What was the magnitude of its acceleration?

What happens to the period of a pendulum and the period of a spring as the amplitude of the oscillation increases? Briefly give an explanation for this relationship.